drm/nouveau/nvif: simplify and tidy library interfaces

A variety of tweaks to the NVIF library interfaces, mostly ripping out
things that turned out to be not so useful.

- Removed refcounting from nvif_object, callers are expected to not be
  stupid instead.
- nvif_client is directly reachable from anything derived from nvif_object,
  removing the need for heuristics to locate it
- _new() versions of interfaces, that allocate memory for the object
  they construct, have been removed.  The vast majority of callers used
  the embedded _init() interfaces.
- No longer storing constructor arguments (and the data returned from
  nvkm) inside nvif_object, it's more or less unused and just wastes
  memory.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 6 insertions, 43 deletions

diff --git a/drivers/gpu/drm/nouveau/nvif/notify.c b/drivers/gpu/drm/nouveau/nvif/notify.c
index 8e34748709a0..b0787ff833ef 100644
--- a/drivers/gpu/drm/nouveau/nvif/notify.c
+++ b/drivers/gpu/drm/nouveau/nvif/notify.c
@@ -124,7 +124,7 @@ nvif_notify(const void *header, u32 length, const void *data, u32 size)
 	}
 
 	if (!WARN_ON(notify == NULL)) {
-		struct nvif_client *client = nvif_client(notify->object);
+		struct nvif_client *client = notify->object->client;
 		if (!WARN_ON(notify->size != size)) {
 			atomic_inc(&notify->putcnt);
 			if (test_bit(NVIF_NOTIFY_WORK, &notify->flags)) {
@@ -156,7 +156,7 @@ nvif_notify_fini(struct nvif_notify *notify)
 	if (ret >= 0 && object) {
 		ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
 		if (ret == 0) {
-			nvif_object_ref(NULL, &notify->object);
+			notify->object = NULL;
 			kfree((void *)notify->data);
 		}
 	}
@@ -164,9 +164,9 @@ nvif_notify_fini(struct nvif_notify *notify)
 }
 
 int
-nvif_notify_init(struct nvif_object *object, void (*dtor)(struct nvif_notify *),
-		 int (*func)(struct nvif_notify *), bool work, u8 event,
-		 void *data, u32 size, u32 reply, struct nvif_notify *notify)
+nvif_notify_init(struct nvif_object *object, int (*func)(struct nvif_notify *),
+		 bool work, u8 event, void *data, u32 size, u32 reply,
+		 struct nvif_notify *notify)
 {
 	struct {
 		struct nvif_ioctl_v0 ioctl;
@@ -175,11 +175,9 @@ nvif_notify_init(struct nvif_object *object, void (*dtor)(struct nvif_notify *),
 	} *args;
 	int ret = -ENOMEM;
 
-	notify->object = NULL;
-	nvif_object_ref(object, &notify->object);
+	notify->object = object;
 	notify->flags = 0;
 	atomic_set(&notify->putcnt, 1);
-	notify->dtor = dtor;
 	notify->func = func;
 	notify->data = NULL;
 	notify->size = reply;
@@ -211,38 +209,3 @@ done:
 		nvif_notify_fini(notify);
 	return ret;
 }
-
-static void
-nvif_notify_del(struct nvif_notify *notify)
-{
-	nvif_notify_fini(notify);
-	kfree(notify);
-}
-
-void
-nvif_notify_ref(struct nvif_notify *notify, struct nvif_notify **pnotify)
-{
-	BUG_ON(notify != NULL);
-	if (*pnotify)
-		(*pnotify)->dtor(*pnotify);
-	*pnotify = notify;
-}
-
-int
-nvif_notify_new(struct nvif_object *object, int (*func)(struct nvif_notify *),
-		bool work, u8 type, void *data, u32 size, u32 reply,
-		struct nvif_notify **pnotify)
-{
-	struct nvif_notify *notify = kzalloc(sizeof(*notify), GFP_KERNEL);
-	if (notify) {
-		int ret = nvif_notify_init(object, nvif_notify_del, func, work,
-					   type, data, size, reply, notify);
-		if (ret) {
-			kfree(notify);
-			notify = NULL;
-		}
-		*pnotify = notify;
-		return ret;
-	}
-	return -ENOMEM;
-}